Claim

In the Mississippi River Basin, agricultural liming acted as a net carbon sink over the past century relative to the study’s anthropogenic-acidity counterfactual.

Type CAUSAL · truth-evaluable: yes · status at snapshot: ACTIVE · created seq 25159 · qualifiers {"location":"Mississippi River Basin","time_range":"Approximately 1900–2015, the century-scale study interval","denominator":"Compared with an acidity-only counterfactual"}

Referenced 151 times: checked 1, looked up by assistants 0, viewed 109, shared 41. A count of attention, not evidence.

Topics

Climate · 1efd24fe

Assessment

Leans supported

Score: 0.7991 under ledger-default@0.3.0 at snapshot 27745

3 of 4 review checks done · 1 counted · 2 by the author only

1 independent evidence lineage · review checks 1 of 4 · stability LOW

Main unresolved issue: 3 counted evidence items have no independence review; repeats of one origin may be counted as several coverage:87bd5479-e4dc-8be8-a024-d4d72251ba95

Not yet independently audited.This assessment depends heavily on modeling choices.A quoted passage from nature.com was not found on the page when Galedra fetched it.

Why?

Strongest counted support: Century-scale records and modelling identified agricultural liming as a net carbon sink in the Mississippi River Basin over the past century. weight 2.000000 evidence

Suppressed as dependent: The excerpt says agricultural liming acted as a net carbon sink in the Mississippi River Basin over the past century.

Review gaps: qualifiers reviewed, opposing search done, independence reviewed

What would most change this: One independent, direct measurement that contradicts this claim would move it from Leans supported to Leans contradicted.

Hide calculation

0.7991 under ledger-default@0.3.0 at snapshot 27745 · state Leans supported · Review checks: 1 of 4 · stability LOW · 3 sources, 1 independent lineage

Model ledger-default@0.3.0 (the default model, not the answer) · snapshot 27745 · trace sha256:b1ee642b8fa6b03ee6420c96fe5187b05c3b0c5d9b5798689ae92568a0dffcf0

Last changed at entry seq 25758; nothing logged since has borne on this claim.

How the number was reached

Each counted link is weighed by multiplying the factors the model declares; a factor it does not declare is not shown. Every factor name below links to what that number means.

Link	Working	Weight	Counted as
8c01c6ee support	relevance DIRECT 2.0 × observation MEASUREMENT 1.0 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	2.000000	2.000000
596ebd39 qualify	relevance DIRECT 2.0 × observation MODEL_OUTPUT 0.0 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	0.000000	0.000000 (non directional)
26a9a415 support	relevance DIRECT 2.0 × observation DIRECT_TEXT 0.9 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	1.800000	0.000000 (dependent strongest only, kept 8c01c6ee)

prior 0.35 → log-odds -0.619039 + 2.000000 (the counted weights) = 1.380961 → probability 0.7991

Under neighbouring settings of the same model: 0.6859 to 0.8788, a spread of 0.1929.

Half-even rounding, six places for weights and four for the probability. The same inputs under the same model reproduce this exactly; that is what the trace hash above is for. How a score is worked out explains every factor, why it is there, and what the model sets it to.

Your view

Registered views

Nobody has registered a view yet.

Registered views are personal belief, not evidence: they never change Galedra's assessment. Affiliations are self-declared and shown only for groups of 5 or more.

Checked as part of

Statements this claim was broken out of. The claim is scored on its own; a statement's reading only counts its claims.

“In the Mississippi River Basin, century-scale records and reactive-transport modelling found agricultural liming acted as a net carbon sink relative to an...” · 2 claims · 29 September 2026

Evidence for

Century-scale records and modelling identified agricultural liming as a net carbon sink in the Mississippi River Basin over the past century.

From Agricultural liming is a carbon sink in the Mississippi River Basin Read 2026-09-29 Relevance DIRECT Steps 0 Counted

The primary article states the basin-scale result and defines the counterfactual framework.
The excerpt says agricultural liming acted as a net carbon sink in the Mississippi River Basin over the past century.

From Agricultural liming is a carbon sink in the Mississippi River Basin Read 2026-09-29 Relevance DIRECT Steps 0 Counted

Evidence against

None.

Qualifications

Model simulations showed an initial emissions pulse before sustained carbon removal emerged after soil acidity neutralization.

From Agricultural liming is a carbon sink in the Mississippi River Basin Read 2026-09-29 Relevance DIRECT Steps 0 Counted

The result is time-dependent: an initial emissions pulse precedes sustained removal.

Suppressed as dependent

Evidence	Group	Kept instead
c95cba65		8c01c6ee

Inferences

Concluded from

None.

Used as a premise in

None.

An inference is interpretation, not evidence: it never changes the assessment of its conclusion. Each premise is a claim with its own evidence.

Threads

None. Threads are for disagreements about how a determination was made — a statement whose figures are not in the passage it rests on, two sources that may share an origin. Something about the world belongs in the evidence above.

Claim edges

None. Edges are stored and displayed; v0.1 does not propagate probability across them.

Review checklist

Review checks: 1 of 4

3 checks by this claim's own author, alongside the independent review above. 1 OPPOSING EVIDENCE SEARCH · 1 QUALIFIER CHECK · 1 EVIDENCE VERIFICATION. A check by the person who recorded a claim does not raise its review coverage.

Check	Done	By
qualifiers reviewed	no
opposing search done	no
independence reviewed	no
primary source reviewed	yes	8c01c6ee, 596ebd39, 26a9a415

Summary

Leans supported. The main support is: Century-scale records and modelling identified agricultural liming as a net carbon sink in the Mississippi River Basin over the past century. 6cc83912

1 further item repeats the same origin and is not independent evidence. c95cba65

Qualifier: Model simulations showed an initial emissions pulse before sustained carbon removal emerged after soil acidity neutralization. dac5228f

A search for evidence in the opposing direction found none. 26254810

Review checks: 1 of 4. coverage:87bd5479-e4dc-8be8-a024-d4d72251ba95

Generated by stub-v0.1; every sentence cites graph ids.

Contribution history

seq	event	detail
25159	APPENDED
25160	ACCEPT	AUTOMATIC_AFTER_VALIDATION
25169	LINK_EVIDENCE	by 1efd24fe (accepted)
25173	LINK_EVIDENCE	by 1efd24fe (accepted)
25195	TASK_RESULT	by 1efd24fe (accepted)

Score trace

{
  "claim": "87bd5479-e4dc-8be8-a024-d4d72251ba95",
  "links": [
    {
      "link": "4090734c-5070-847e-95be-ee918c01c6ee",
      "group": null,
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "da8df864-f383-8043-bdb8-05536cc83912",
      "direction": "SUPPORT",
      "magnitude": "2.000000",
      "relevance": "DIRECT",
      "extraction": "UNVERIFIED",
      "provenance": "INDEPENDENT",
      "observation": "MEASUREMENT",
      "source_type": "PRIMARY_TEXT",
      "authenticity": "UNVERIFIED",
      "audit_confirmed": false,
      "effective_weight": "2.000000",
      "interpretive_steps": 0
    },
    {
      "link": "7983829c-d477-87ff-81a5-075f596ebd39",
      "group": null,
      "reason": "non_directional",
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "908918fa-5fc7-8b60-ae50-7a83dac5228f",
      "direction": "QUALIFY",
      "magnitude": "0.000000",
      "relevance": "DIRECT",
      "extraction": "UNVERIFIED",
      "provenance": "INDEPENDENT",
      "observation": "MODEL_OUTPUT",
      "source_type": "PRIMARY_TEXT",
      "authenticity": "UNVERIFIED",
      "audit_confirmed": false,
      "effective_weight": "0.000000",
      "interpretive_steps": 0
    },
    {
      "kept": "4090734c-5070-847e-95be-ee918c01c6ee",
      "link": "f6cfa1f3-abd7-8ee8-8dc0-e38826a9a415",
      "group": null,
      "reason": "dependent_strongest_only",
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "59b77df5-5ee6-876e-b189-97cdc95cba65",
      "direction": "SUPPORT",
      "magnitude": "1.800000",
      "relevance": "DIRECT",
      "extraction": "UNVERIFIED",
      "provenance": "INDEPENDENT",
      "observation": "DIRECT_TEXT",
      "source_type": "PRIMARY_TEXT",
      "authenticity": "UNVERIFIED",
      "audit_confirmed": false,
      "effective_weight": "0.000000",
      "interpretive_steps": 0
    }
  ],
  "model": "ledger-default@0.3.0",
  "prior": "0.35",
  "variants": {
    "spread": "0.1929",
    "permissive": "0.8788",
    "conservative": "0.6859"
  },
  "code_hash": "sha256:c61a6fdf35a754a0d7e958df149036a083c0eaeb7d2d2e52704ec32b0c36def7",
  "contested": false,
  "stability": "LOW",
  "claim_type": "CAUSAL",
  "config_hash": "sha256:86768038080b8ab5233f1e4b7aba10af05b5bb44caa432095150b90e81209809",
  "probability": "0.7991",
  "provisional": true,
  "evidence_sum": "2.000000",
  "snapshot_seq": 25758,
  "prior_log_odds": "-0.619039",
  "support_groups": 1,
  "model_dependent": true,
  "review_coverage": "0.25",
  "truth_evaluable": true,
  "assessment_state": "LEANS_SUPPORTED",
  "review_checklist": {
    "qualifiers_reviewed": {
      "by": [],
      "ok": false
    },
    "opposing_search_done": {
      "by": [],
      "ok": false
    },
    "independence_reviewed": {
      "by": [],
      "ok": false
    },
    "primary_source_reviewed": {
      "by": [
        "4090734c-5070-847e-95be-ee918c01c6ee",
        "7983829c-d477-87ff-81a5-075f596ebd39",
        "f6cfa1f3-abd7-8ee8-8dc0-e38826a9a415"
      ],
      "ok": true
    }
  },
  "contradict_groups": 0,
  "rounding_boundary": false,
  "posterior_log_odds": "1.380961",
  "not_applicable_reason": null,
  "independence_unreviewed": 3
}